In message <4c7a6b01.3030...@rubidium.dyndns.org>, Magnus Danielson writes: >On 08/29/2010 03:55 PM, Attila Kinali wrote:
>It's a complicated field and several traps to fall into on the way. It >is a fairly sizeable project to attempt. Well, as with so much else, it depends what the level of ambition is. If you just want to be able to point to the resonance and say "I did that", it is not intrinsically hard and none of the materials are hard to get hold of or particularly poisonous. Few of the problems Ramsey fought in the early 1950'ies are relevante today, for instance, the entire detection issue is trivially solved with USRP/GnuRadio. I would tend to think that $10k in materials would get you pretty close. I think the most recent H-maser design is Neuchatels design for the Galileo GNSS. Building a _good_ (ie: metrology grade) hydrogen maser, sounds like the last significant thing you did in your life, however many years you have left... Poul-Henning PS: And if you even manage to build something which works half the time, and do not suffer from ethics, there is a finite but very profitable market for audiopholery, and I'm sure somebody is willing to eliminate the last traces of jitter in his CD-player for just under $100k... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.